Feature spec
Goal: Send a clear invoice after finishing a job.
- Add a client, line items, a due date, and payment instructions.
- Preview the total before exporting a PDF.
- Keep an editable draft if export fails.
App Overview
Currency Pro - Real-Time Rates
The Premium Currency Converter
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
Evidence scope: No current overall US chart position is available. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.
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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included15 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Screen plan
Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.
States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.
Differentiate and validate
Hypothesis: Contractors need faster repeat invoices more than more templates.
First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.
The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.
Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.
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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Currency Pro - Real-Time Rates: map the core Finance workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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Opportunities
AI-GENERATED OPPORTUNITY HYPOTHESES
These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.
Hypothesis 1
Expand currency selection and include favorites.
Assumption to check: Limited currency options compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Add a feature to view historical rates and trends.
Assumption to check: No historical data for conversions
Validate with people who use this workflow before building.
Hypothesis 3
Implement alerts for significant rate fluctuations.
Assumption to check: No notifications for rate changes
Validate with people who use this workflow before building.
Hypothesis 4
Simplify UI and enhance user onboarding.
Assumption to check: User interface can be overwhelming
Validate with people who use this workflow before building.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
The Premium Currency Converter. No Ads. No Distractions. Just Accurate Exchange Rates. Currency Pro is the ultimate tool for travelers, professionals, and finance-savvy users looking for fast and reliable currency conversion. Get real-time FX rates, calculate conversions instantly, and enjoy an ad-free experience—all in one powerful app. KEY FEATURES: - Real-Time Exchange Rates for over 160 currencies worldwide - Built-in Calculator for fast on-the-fly conversions - Daily Updated Data using trusted financial sources - Absolutely No Ads – enjoy an uninterrupted interface - Supports all major currencies: USD, EUR, JPY, GBP, CHF, AUD, CAD, and more - Offline Mode – last known rates always available - Clean, Modern Design for a smooth user experience - Dark Mode Compatible - 100% Privacy – we collect no personal data Why Currency Pro? Unlike other apps overloaded with ads or unnecessary complexity, Currency Pro is fast, minimalist, and completely ad-free. Perfect for when you just need a quick and accurate conversion.
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
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Build scope
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Define the first version
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Set boundaries
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Check the hard parts
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
SUGGESTED BUILD STACK
React Native
Expo
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BUILD KIT DIFFICULTY
Intermediate
From the Build Kit assessment.
A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.
